Sieniawski is a Polish surname, it may refer to:Adam Hieronim Sieniawski (1576–1616), Polish–Lithuanian noble Adam Hieronim Sieniawski (1623–1650), Polish noble, starost of Lwów since 1648, Field Clerk of the Crown since 1649 Adam Mikołaj Sieniawski (1666–1726), Polish noble (szlachcic), military leader Hieronim Jarosz Sieniawski (1516–1579), Polish noble Mikołaj Hieronim Sieniawski (1645–1683), Polish noble (szlachcic), military leader, politician Mikołaj Sieniawski (1489–1569), notable Polish magnate, military commander and politician Prokop Sieniawski (1602–1626), Polish noble